The mechanical properties and shape memory behavior of compounds formed from a commercial poly (ethylene-co-methacrylic acid) ionomer and zinc stearate (ZnSt) are described. For compounds containing less than 10 wt% ZnSt, the components were miscible. Although the components were only partially miscible above 10 wt% ZnSt, the compounds were compatible, as judged by their macroscopic homogeneity and the improvements of the mechanical properties. The addition of 30 wt% ZnSt produced ductile materials and improved the room temperature tensile modulus by ∼50% and the stress at yield by ∼30%. The strain at yield, however, decreased by ∼45%. Compounds with 40 or 50 wt% ZnSt improved the modulus of the ionomer by nearly 100%, but the compounds were relatively brittle and broke before yielding. Shape memory behavior was demonstrated with a compound containing 50 wt% ZnSt where nanophase-separated ionic aggregates acted as a permanent network and a phase-separated ZnSt crystalline phase was a reversible, temporary network. The shape memory behavior was repeatable over five consecutive shape memory cycles with shape fixity and shape recovery values of ∼92% and ∼97%, respectively.

从商业聚形成的化合物的机械特性和形状记忆行为（乙烯-共描述了（甲基丙烯酸）离聚物和硬脂酸锌（ZnSt）。对于含少于10 wt％ZnSt的化合物，这些组分是可混溶的。尽管这些组分在高于10 wt％的ZnSt时只能部分混溶，但从其宏观均匀性和机械性能的改善来看，这些化合物是相容的。添加30 wt％的ZnSt可以产生韧性材料，并且室温拉伸模量可提高约50％，屈服应力可提高约30％。但是，屈服应变降低了约45％。具有40或50 wt％ZnSt的化合物可将离聚物的模量提高近100％，但这些化合物比较脆，在屈服前会断裂。含有50 wt％ZnSt的化合物证明了形状记忆行为，其中纳米相分离的离子聚集体起永久作用网络和相分离的ZnSt结晶相是可逆的临时网络。形状记忆行为在五个连续的形状记忆循环中可重复，形状固定性和形状恢复值分别约为92％和97％。